I spent my free time this past week watching youtube videos about dimensions beyond our 3+ (spacetime). I was drawn there, because I wanted to try to visualize a hypercube/tesseract, and thought that there would be some good videos on that topic.
   What I wound up spending most of my time doing, was watching videos on other ideations of extra-dimensional space. The basic, agreed upon issue, is that there are 10+ dimensions, in theory. But what these dimensions actually ARE, is a matter of speculation. Some speculate that the higher dimesnsions are tiny, or all wound up in a knot, or apparently whatever turns them on. As these dimensons are beyond mundane perception, it seems that scientists let their hair down and get creative.
  Rob Bryanton has a series of videos exploring and explaining one way of articulating the ensemble of dimensions. (10thdimension.com)  His videos on the subject are very informative. He embraces one of three main branches that try to explain the multiverse - that collection of universes that comprise the whole of everything. they call these theories, "Theories of Everything", or "TOE's".
  In a general way, there are 3 competing TOE's. There is the "Bubble Universe" theory, in which we have either discreet portions of this universe, or areas within black holes, or areas (bubbles) so far from our light cone that they will never touch on our galaxy through gravity light etc, where the basic laws are different: we exist here, with these laws of physics, because this "bubble" is suited for us to develop.  Then, there is the "Membranes" theory, in which it is supposed that the 3d planes of our reality, exist side by side with other iterations of reality, lying like pages in a book across 9-dimensional space (this is the one that "String Theory" supports/comes from). The "Membranes", or 'Branes', would each contain entire 3d universes, stacked together side by side in a great "deck of the multiverse". The last of the TOE's, is the "ManyWorlds" theory of quantum mechanics. If Brane theory posits visualizing the TOE as 3d universes stacked togeher like a deck of cards or pages in a book, Many Worlds offers a visualization of constant, ever-branching realities, in which everything that could happen, does in fact happen. Every time the "wave function" collapses, Many Worlds suggests that BOTH or MANY outcomes actually do occur, and reality branches off. In this model, the multiverse is a reality in which everything branches out in greater and greater complexity.
  I do not have an opinion about which of the 3 "theories of everything" (TOE's) is correct. However, I hold the opinion that one of them is certainly correct in broad strokes. While there are certainly more than twice as many dimensions in reality, than those available to our perception, what that actually means is clearly difficult to ascertain. We have no (known) capacity to perceive dimensions, beyond the mundane sucessive 3 dimensional Planck-frames moving in one direction (mundane spacetime). Within our mundane spacetime frame of reference, our sense of dimensionality suggests that successive dimensions "grow" at right angles to the existing ones.  What this means when we try to "grow" a fourth spatial dimension, is the source of the confusion. We are simply not designed to perceive whatever exists at a right angle to spacetime.
   When we use additional dimensions (to 3 dimensions, or 3 + time) in mathematics, there is little difficulty. But when we try to imagine or visualize these extra dimensions as something real and concrete, we simply lack the necessary referrents. The "10thDimension.com" site offers the suggestion that the 4th dimension is like time ( it calls it a "Worldline" in its parlance), and calls the 5th dimension, a "Probability plane" - which seems to touch on the Many Worlds TOE. This answer to "what is at a right angle to spacetime", is then "different possible iterations of spacetime". It makes a kind of sense, but is not a very satisfying "spatial direction".
   While I am not a mathematician or any stripe of scientist, it seems to me that the competing TOE theories may be each stating something similar - again, in broad strokes. I have a strong intuition that they each contain the other - that these three TOE's are just 3 ways of looking at the same TOE. It is possible that I own this intuition purely because of my ignorance of the complex mathematics that underlie these theories. However, it is too late in the game for me to discard intuition as my guiding priciple.\
  The TOE's offer very fertile ground for wild flights of fancy, as well as metaphysical and spiritual fantasizing. This potential is realized by interested, poorly educated laypersons like myself, as well as by the scientists and mathematicians that are carving careers in this and other fields. As I watched a "10thdimension.com" video on the 10th dimension, it occurred to me that what Mr Bryanton was descrining, was a way of apprehing God...
   I am not on the same page with him. However, the TOE's do offer some very useful ways to look at spiritual issues. I noticed, among the Many Worlds consequences, a satisfying (to me) answer to the question of Gods Goodness, or "why do bad things happen to good people?". If everything that could happen, does in fact happen, then it is not really that bad things happen to good people, but that everything that can happen, does in fact happen - and so if we could examine enough probability paths, we could observe everything that could happen to a person, actually occur. In that sense, All possible things happen to all possible people: the fact that we inhabit one probability path obscures our view of these other occurences.